﻿// ==本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例，可直接使用，建议理解后融入自己程序==

// 用双端口加载主JS文件Lodop.js(或CLodopfuncs.js兼容老版本)以防其中某端口被占:
var MainJS = "CLodopfuncs.js";
var URL_WS1 = "ws://localhost:8000/" + MainJS; // ws用8000/18000
var URL_WS2 = "ws://localhost:18000/" + MainJS;
var URL_HTTP1 = "http://localhost:8000/" + MainJS; // http用8000/18000
var URL_HTTP2 = "http://localhost:18000/" + MainJS;
var URL_HTTP3 = "https://localhost.lodop.net:8443/" + MainJS; // https用8000/8443

var CreatedOKLodopObject, LoadJsState;

// ==判断是否需要CLodop(那些不支持插件的浏览器):==
function needCLodop() {
  try {
    var ua = navigator.userAgent;
    if (ua.match(/Windows\sPhone/i) ||
      ua.match(/iPhone|iPod|iPad/i) ||
      ua.match(/Android/i) ||
      ua.match(/Edge\D?\d+/i)) { return true; }
    var verTrident = ua.match(/Trident\D?\d+/i);
    var verIE = ua.match(/MSIE\D?\d+/i);
    var verOPR = ua.match(/OPR\D?\d+/i);
    var verFF = ua.match(/Firefox\D?\d+/i);
    var x64 = ua.match(/x64/i);
    if ((!verTrident) && (!verIE) && (x64)) return true;
    else if (verFF) {
      verFF = verFF[0].match(/\d+/);
      if ((verFF[0] >= 41) || (x64)) return true;
    } else if (verOPR) {
      verOPR = verOPR[0].match(/\d+/);
      if (verOPR[0] >= 32) return true;
    } else if ((!verTrident) && (!verIE)) {
      var verChrome = ua.match(/Chrome\D?\d+/i);
      if (verChrome) {
        verChrome = verChrome[0].match(/\d+/);
        if (verChrome[0] >= 41) return true;
      }
    }
    return false;
  } catch (err) {
    return true;
  }
}

// ==检查加载成功与否，如没成功则用http(s)再试==
// ==低版本CLODOP6.561/Lodop7.043及前)用本方法==
function checkOrTryHttp() {
  if (window.getCLodop) {
    LoadJsState = "complete";
    return true;
  }
  if (LoadJsState === "loadingB" || LoadJsState === "complete") return;
  LoadJsState = "loadingB";
  var head = document.head || document.getElementsByTagName("head")[0] || document.documentElement;
  var JS1 = document.createElement("script");
  var JS2 = document.createElement("script");
  var JS3 = document.createElement("script");
  JS1.src = URL_HTTP1;
  JS2.src = URL_HTTP2;
  JS3.src = URL_HTTP3;
  JS1.onload = JS2.onload = JS3.onload = JS2.onerror = JS3.onerror = function() { LoadJsState = "complete"; }
  JS1.onerror = function(e) {
    if (window.location.protocol !== 'https:') { head.insertBefore(JS2, head.firstChild); } else { head.insertBefore(JS3, head.firstChild); }
  }
  head.insertBefore(JS1, head.firstChild);
}

// ==加载Lodop对象的主过程:==
(function loadCLodop() {
  if (!needCLodop()) return;
  // CLodopIsLocal = !!((URL_WS1 + URL_WS2).match(/\/\/localho|\/\/127.0.0./i));
  LoadJsState = "loadingA";
  if (!window.WebSocket && window.MozWebSocket) window.WebSocket = window.MozWebSocket;
  // ws方式速度快(小于200ms)且可避免CORS错误,但要求Lodop版本足够新:
  try {
    var WSK1 = new WebSocket(URL_WS1);
    WSK1.onopen = function(e) { setTimeout(checkOrTryHttp, 200); }
    // WSK1.onmessage = function(e) { if (!window.getCLodop) JSON.parse(e.data); }
    WSK1.onerror = function(e) {
      var WSK2 = new WebSocket(URL_WS2);
      WSK2.onopen = function(e) { setTimeout(checkOrTryHttp, 200); }
      // WSK2.onmessage = function(e) { if (!window.getCLodop) JSON.parse(e.data); }
      WSK2.onerror = function(e) { checkOrTryHttp(); }
    }
  } catch (e) {
    checkOrTryHttp();
  }
})();

// ==获取LODOP对象主过程,判断是否安装、需否升级:==
export function getLodop(oOBJECT, oEMBED) {
  var LODOP;
  try {
    var isWinIE = (/MSIE/i.test(navigator.userAgent)) || (/Trident/i.test(navigator.userAgent));
    // var isWinIE64 = isWinIE && (/x64/i.test(navigator.userAgent));
    var isLinuxX86 = (/Linux/i.test(navigator.platform)) && (/x86/i.test(navigator.platform));
    var isLinuxARM = (/Linux/i.test(navigator.platform)) && (/aarch/i.test(navigator.platform));

    if (needCLodop() || isLinuxX86 || isLinuxARM) {
      try {
        LODOP = window.getCLodop();
      } catch (err) { return false }
      if (!LODOP && LoadJsState !== "complete") {
        if (!LoadJsState) { alert("未曾加载Lodop主JS文件，请先调用loadCLodop过程."); } else { alert("网页还没下载完毕，请稍等一下再操作."); }
        return;
      }
      if (!LODOP) {
        // 返回false未找到软件需要安装
        return false;
      }
    } else {
      // ==如果页面有Lodop插件就直接使用,否则新建:==
      if (oOBJECT || oEMBED) {
        if (isWinIE) { LODOP = oOBJECT; } else { LODOP = oEMBED; }
      } else if (!CreatedOKLodopObject) {
        LODOP = document.createElement("object");
        LODOP.setAttribute("width", 0);
        LODOP.setAttribute("height", 0);
        LODOP.setAttribute("style", "position:absolute;left:0px;top:-100px;width:0px;height:0px;");
        if (isWinIE) { LODOP.setAttribute("classid", "clsid:2105C259-1E0C-4534-8141-A753534CB4CA"); } else { LODOP.setAttribute("type", "application/x-print-lodop"); }
        document.documentElement.appendChild(LODOP);
        CreatedOKLodopObject = LODOP;
      } else { LODOP = CreatedOKLodopObject; }
      // ==Lodop插件未安装时提示下载地址:==
      // if ((!LODOP) || (!LODOP.VERSION)) {
      //   document.body.innerHTML = (isWinIE64 ? strLodop64Install : strLodopInstall) + strInstallOK + document.body.innerHTML;
      //   return LODOP;
      // }
      // if (LODOP.VERSION < "6.2.2.6") {
      //   document.body.innerHTML = (isWinIE64 ? strLodop64Update : strLodopUpdate) + strInstallOK + document.body.innerHTML;
      // }
    }
    // ===如下空白位置适合调用统一功能(如注册语句、语言选择等):=======================
    LODOP.SET_LICENSES("", "EE0887D00FCC7D29375A695F728489A6", "C94CEE276DB2187AE6B65D56B3FC2848", "");
    // LODOP.SET_LICENSES("", "13F0BE65846276CB60111433C6280000", "", "");
    // ===============================================================================
    return LODOP;
  } catch (err) {
    alert("getLodop出错:" + err);
  }
}

